<template>
    <div>
          <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 提示区 -->
              <el-alert
                title="添加商品信息"
                type="info"
                center
                show-icon :closable="false">
              </el-alert>
              <!-- 步骤条区域 -->
              <el-steps :space="200" :active="activeIndex -0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
              </el-steps>

              <!-- tab区域 -->
              <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
               <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                 <el-tab-pane label="基本信息" name="0">
                     <el-form-item label="商品名称" prop="goods_name">
                         <el-input v-model="addForm.goods_name"></el-input>
                     </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price" type="number">
                         <el-input v-model="addForm.goods_price"></el-input>
                     </el-form-item>
                     <el-form-item label="商品重量" prop="goods_weight">
                         <el-input v-model="addForm.goods_weight"></el-input>
                     </el-form-item>
                     <el-form-item label="商品数量" prop="goods_number">
                         <el-input v-model="addForm.goods_number"></el-input>
                     </el-form-item>
                     <el-form-item label="商品分类" prop="goods_cat">
                        <el-cascader
                            expand-trigger="hover"
                            :props="CateProps"
                            v-model="addForm.goods_cat"
                            :options="catelist"
                            @change="handleChange">
                        </el-cascader>
                     </el-form-item>
                 </el-tab-pane>
                 <el-tab-pane label="商品参数" name="1">
                    <!--渲染表单的item项-->
                    <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                    <!--复选框组-->
                    <el-checkbox-group v-model="item.attr_vals">
                      <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                    </el-checkbox-group>
                    </el-form-item>
                 </el-tab-pane>
                 <el-tab-pane label="商品属性" name="2">
                    <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                        <el-input v-model="item.attr_vals"></el-input>
                    </el-form-item>
                 </el-tab-pane>
                 <el-tab-pane label="商品图片" name="3">
              <!-- action表示图片要上传到的后台api地址-->
                    <el-upload
                       :action="uploadURL"
                       :on-preview="handlePreview"
                       :on-remove="handleRemove"
                       list-type="picture"
                       :headers="headerObj"
                       :on-success="handleSuccess">
                       <el-button size="small" type="primary">点击上传</el-button>
                       
                     </el-upload>
                 </el-tab-pane>
                 <el-tab-pane label="商品内容" name="4">
                    <!--富文本编辑器组件-->
                    <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                    <!--添加商品的按钮-->
                    <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                 </el-tab-pane>
               </el-tabs>
              </el-form>
        </el-card>

        <!--图片预览-->
        <el-dialog
           title="图片预览"
           :visible.sync="previewVisible"
           width="50%">
           <img :src="previewPath" alt="" class="previewImg">
         </el-dialog>
    </div>
</template>
<script>
// import { log } from 'console'
import _ from 'lodash'
export default {
    data(){
        return {
            activeIndex:'0',
            addForm:{
                goods_name:'',
                goods_price: 0,
                goods_weight: 0,
                goods_number: 0,
                goods_cat:[],
                // 图片的数组
                pics:[],
                goods_introduce:'',
                attrs:[]
            },
            addFormRules:{
                goods_name:[
                   {required:true,message:'请输入商品名称',trigger:'blur'},
                ],
                goods_price:[
                   {required:true,message:'请输入商品价格',trigger:'blur'},
                ],
                 goods_weight:[
                   {required:true,message:'请输入商品重量',trigger:'blur'},
                ],
                goods_number:[
                   {required:true,message:'请输入商品数量',trigger:'blur'},
                ],
                goods_cat:[
                   {required:true,message:'请输入商品分类',trigger:'blur'},
                ],
            },
            // 商品分类列表
            catelist:[],
            CateProps:{
                label:'cat_name',
                value:'cat_id',
                children:'children'
            },
            // 动态参数列表
            manyTableData:[],
            // 静态属性列表
            onlyTableData:[],
            // 上传图片的url地址
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            // 图片上传组件的header请求头
            headerObj:{
                Authorization:window.sessionStorage.getItem('token')
            },
            previewPath:'',
            previewVisible:false
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
        //    获取所有商品分类数据
       async getCateList(){
           const {data:res}=await this.$http.get(`categories`)

           if(res.meta.status!==200){
               return this.$message.error("获取商品列表失败")
           }
           this.catelist=res.data
           console.log(this.catelist);
       },
    //    级联选择框选中时触发函数
       handleChange(){
           console.log(this.addForm.goods_cat);
           if(this.addForm.goods_cat.length!==3){
               this.addForm.goods_cat=[]
           }
       },
       beforeTabLeave(activeName,oldActiveName){
        //    console.log('即将离开的标签页名字是:'+oldActiveName);
        //    console.log('即将离开的标签页名字是:'+activeName);
        //    return false
           if(oldActiveName==='0'&& this.addForm.goods_cat.length!==3){
               this.$message.error("请选择商品分类")
               return false
           }
       },
       async tabClicked(){
        //    console.log(this.activeIndex);
        if(this.activeIndex==='1'){
            // console.log("动态参数面板");
            const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,
            {params: {sel:'many'}}
        )
        if(res.meta.status !==200){
            return this.$message.error("获取动态参数列表失败")
         }
         console.log(res.data)
         res.data.forEach(item=>{
            item.attr_vals= item.attr_vals.length===0 ? [] : item.attr_vals.split(' ')
         })
         this.manyTableData=res.data

        }else if(this.activeIndex==='2'){
           const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,
            {params: {sel:'only'}})
            if(res.meta.status!==200){
                return this.$message.error("获取静态属性失败")
            }
            console.log(res.data)
            this.onlyTableData=res.data
        }
       },
    //    处理图片的预览效果
       handlePreview(file){
           console.log(file);
           this.previewPath=file.response.data.url
           this.previewVisible=true
       },
    //    处理移除图片的操作
       handleRemove(file){
        //    console.log(file);
        //   获取将要删除的图片的临时路径
        const filePath=file.response.data.tem_path
        // 从pics数组中，找到这个图片对应的索引值
        const i= this.addForm.pics.findIndex(x=>x.pic===filePath)
        // 调用数组的splice方法，吧图片信息对象，从pics数组中移除
        this.addForm.pics.splice(i,1)
        console.log(this.addForm);
       },
    //    监听图片上传成功事件
       handleSuccess(response){
           console.log(response);
        // 拼接得到一个图片对象
        const picInfo={pic:response.data.tem_path}

        // 将图片信息对象，push到pics数组中
        this.addForm.pics.push(picInfo)
        console.log(this.addForm);
       },
       add(){
        //    console.log(this.addForm);
        this.$refs.addFormRef.validate(async valid=>{
            if(!valid){
                return this.$message.error('请填写必要的表单项')
            }
            // 执行添加的业务逻辑
            const form =_.cloneDeep(this.addForm)
            form.goods_cat= form.goods_cat.join(',')
            // 处理动态参数
            this.manyTableData.forEach(item=>{
                const newInfo={attr_id:item.attr_id,
                attr_value:item.attr_vals}
                this.addForm.attrs.push(newInfo)
            })
            // 处理静态属性
            this.onlyTableData.forEach(item=>{
                const newInfo={attr_id:item.attr_id,attr_vals:item.attr_vals}
                this.addForm.attrs.push(newInfo)
            })
            form.attrs=this.addForm.attrs
            console.log(form);
            // 发起请求添加商品
            // 商品的名称，必须是唯一的
            const {data:res}=await this.$http.post('goods',form)
            if(res.meta.status!==201){
                return this.$message.error('添加商品失败')
                
            }
            this.$message.success('添加商品成功')
            this.$router.push('/goods')
        })
       }
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length===3){
                return this.addForm.goods_cat[2]
            }
            return nul
        }
    }
}
</script>
<style  scoped>
.el-checkbox {
    margin: 0 10px 0 0 !important;
}
.previewImg{
    width: 100%;
}
.btnAdd{
    margin-top: 15px;
}
</style>